The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2009
Filed:
Apr. 29, 2005
Christopher H. Dick, San Jose, CA (US);
Frederic J. Harris, San Diego, CA (US);
Christopher H. Dick, San Jose, CA (US);
Frederic J. Harris, San Diego, CA (US);
Xilinx, Inc., San Jose, CA (US);
Abstract
Method and apparatus for peak-to-amplitude ratio reduction are described. A data carrying signal waveform with sub-carrier signals (S-through S-M) is obtained. An initial peak reduction waveform (S()) is obtained by selection of a portion of the sub-carrier signals (S-through S-M) for non-data carrying. The initial peak reduction waveform (S()) is refined by at least one recursive iteration which combines the initial peak reduction waveform (S()) with a circularly time-shifted version thereof to obtain a resultant peak reduction waveform having a peak side lobe amplitude less than that of the initial peak reduction waveform (S()).